feat(models): add Chinese verbose_name to all 74 models (Phase 4.0)

为所有 Django 模型添加 Meta.verbose_name 和 verbose_name_plural（中文表名），
覆盖 10 个 app 的全部 74 个业务模型。

Phase 4.0 范围：
- 仅 Meta 类级别中文名（用于 Django Admin、drf-spectacular OpenAPI title、错误信息）
- 字段级 verbose_name= 和 help_text= 留待 Phase 4.1（待 PM 补全 DATA_MODEL 后同步）

变更：
- 20 个 models 文件改动（每个模型 +2 行）
- 8 个 0002/0003 迁移文件（Meta options 变更）
- apps/tenant/migrations/0001_initial.py（之前漏生成的 tenant 模型迁移）

manage.py check: 0 issues。

apps/org/models/org_unit.py

@@ -46,6 +46,8 @@ class OrgUnit(SoftDeleteModel):
 
     class Meta:
         db_table = "org_units"
+        verbose_name = "组织节点"
+        verbose_name_plural = "组织节点"
         indexes = [
             models.Index(fields=["parent"], name="idx_org_units_parent"),
             models.Index(fields=["type"], name="idx_org_units_type"),

apps/org/models/staff.py

@@ -89,6 +89,8 @@ class Staff(SoftDeleteModel):
 
     class Meta:
         db_table = "staff"
+        verbose_name = "员工"
+        verbose_name_plural = "员工"
         indexes = [
             models.Index(fields=["org_unit"], name="idx_staff_org_unit"),
             models.Index(fields=["supervisor"], name="idx_staff_supervisor"),
@@ -136,3 +138,5 @@ class StaffPersonalInfo(models.Model):
 
     class Meta:
         db_table = "staff_personal_info"
+        verbose_name = "员工个人信息"
+        verbose_name_plural = "员工个人信息"

apps/org/models/staff_logs.py

@@ -24,6 +24,8 @@ class StaffTransferLog(TimeStampedModel):
 
     class Meta:
         db_table = "staff_transfer_logs"
+        verbose_name = "人事异动记录"
+        verbose_name_plural = "人事异动记录"
         indexes = [
             models.Index(fields=["staff", "-transfer_date"], name="idx_transfer_logs_staff"),
             models.Index(fields=["transfer_type", "-operated_at"], name="idx_transfer_logs_type"),
@@ -54,6 +56,8 @@ class StaffRewardPunish(SoftDeleteModel):
 
     class Meta:
         db_table = "staff_reward_punish"
+        verbose_name = "奖惩记录"
+        verbose_name_plural = "奖惩记录"
 
 
 class StaffAccount(TimeStampedModel):
@@ -70,6 +74,8 @@ class StaffAccount(TimeStampedModel):
 
     class Meta:
         db_table = "staff_accounts"
+        verbose_name = "员工第三方账号"
+        verbose_name_plural = "员工第三方账号"
         constraints = [
             models.UniqueConstraint(
                 fields=["staff", "platform"],
@@ -94,6 +100,8 @@ class StaffWorkExperience(TimeStampedModel):
 
     class Meta:
         db_table = "staff_work_experiences"
+        verbose_name = "工作经历"
+        verbose_name_plural = "工作经历"
 
 
 class StaffEducation(TimeStampedModel):
@@ -112,6 +120,8 @@ class StaffEducation(TimeStampedModel):
 
     class Meta:
         db_table = "staff_educations"
+        verbose_name = "教育经历"
+        verbose_name_plural = "教育经历"
 
 
 class StaffTraining(TimeStampedModel):
@@ -126,6 +136,8 @@ class StaffTraining(TimeStampedModel):
 
     class Meta:
         db_table = "staff_trainings"
+        verbose_name = "培训记录"
+        verbose_name_plural = "培训记录"
 
 
 class StaffFamilyMember(TimeStampedModel):
@@ -143,6 +155,8 @@ class StaffFamilyMember(TimeStampedModel):
 
     class Meta:
         db_table = "staff_family_members"
+        verbose_name = "家庭成员"
+        verbose_name_plural = "家庭成员"
 
 
 class StaffRemark(SoftDeleteModel):
@@ -162,3 +176,5 @@ class StaffRemark(SoftDeleteModel):
 
     class Meta:
         db_table = "staff_remarks"
+        verbose_name = "员工备注"
+        verbose_name_plural = "员工备注"